Increases and Decreases in congressional candidate filing ratios (2018/2020)

The table below compares the congressional candidates filings for regular elections in 2018 and 2020.
The top three states with the largest decreases and increases in their ratios are highlighted as such in the table.
March 13, 2020, is the date used by Ballotpedia to mark the beginning of nation-wide governmental responses to the COVID-19 pandemic. This same date is used in 2018 as a cutoff date to allow for the comparison of the number of candidates filing per seat up for election before and after March 13 across the two years.
Filing deadlines up to and including March 13 are in dark grey and dates after that are in light grey.